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    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
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<body>
    <script>
        //声明对象
        const school = {
            name:"黑马",
            cities:['北京','上海','深圳'],
            xuekey:['前端','java','大数据','运维']
        };

        // 获取对象所有的键
        // console.log(Object.keys(school));
        // 获取对象所在值
        // console.log(Object.values(school));
        // entries
        // console.log(Object.entries(school));
        // 创建
        // const map = new Map(Object.entries(school));
        // console.log(map.get('name'));
        // map 遍历
        // for (let i of map.values()) console.log(i)

        // 对象属性的描述
        // console.log(Object.getOwnPropertyDescriptors(school));
        
    </script>
</body>
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